202022212020021 has 6 divisors (see below), whose sum is σ = 291809861806710. Its totient is φ = 134681474680008.

The previous prime is 202022212019981. The next prime is 202022212020029. The reversal of 202022212020021 is 120020212220202.

202022212020021 is a `hidden beast` number, since 2 + 0 + 202 + 221 + 20 + 200 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 201808873343025 + 213338676996 = 14205945^2 + 461886^2 .

It is not a de Polignac number, because 202022212020021 - 2¹⁴ = 202022212003637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202022212019976 and 202022212020003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202022212020029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11223456223326 + ... + 11223456223343.

It is an arithmetic number, because the mean of its divisors is an integer number (48634976967785).

Almost surely, 2^{202022212020021} is an apocalyptic number.

It is an amenable number.

202022212020021 is a deficient number, since it is larger than the sum of its proper divisors (89787649786689).

202022212020021 is a wasteful number, since it uses less digits than its factorization.

202022212020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22446912446675 (or 22446912446672 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 202022212020021 its reverse (120020212220202), we get a palindrome (322042424240223).

The spelling of 202022212020021 in words is "two hundred two trillion, twenty-two billion, two hundred twelve million, twenty thousand, twenty-one".